[c-nsp] 2921 Fan noise

[Erik Soosalu]

The 2921 was chosen due to the number of phones I could attach to it.

The thing is that the fans sound like they are on high, but show
environment says they are set to low.  The router is sitting on a two
post rack with lots of room around it.

Just looked at the official sound figures for the router and I see that
the spec is ridiculously loud.  

Time to check out other fans for it...


Thanks,
Erik Soosalu
Network and Security Administrator
Ground Transportation Solutions
a division of Calyx Transportation Group Inc.
T: 905.761.0009 x2143
F: 905-761-6683
E: erik.soosalu at calyxinc.com 

-----Original Message-----
From: Andrew Jones [mailto:Andrew.Jones at alphawest.com.au] 
Sent: Tuesday, October 25, 2011 12:30 AM
To: Erik Soosalu; cisco-nsp at puck.nether.net
Subject: RE: 2921 Fan noise

Hi

I've had the same issues before with other routers.

This was a 3845 and at the time we couldn't find any way to reduce the
noise, but found that if we installed small cooling fans into the small
cabinet they were in, we could reduce the amount of time, (if not
eliminate) that the router was on its high speed fan setting.

Try looking at a 2911, not sure what your performance requirements are,
but it was designed to be 2ru tall so they could fit larger (therefore
quieter, due to lower rpm) fans.

Thanks,

Andrew Jones
Alphawest

-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net
[mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Erik Soosalu
Sent: Sunday, 23 October 2011 5:44 AM
To: cisco-nsp at puck.nether.net
Subject: [c-nsp] 2921 Fan noise

Anyone know if there is a way to quiet down the fans in a 2921?

 

I've got one that will be deployed in an office space and I'm going to
hear about it if I don't do something.

 

Show environment says that it is a quiet as its going to get, but the
fans are really loud still (much louder that the 2821 it is replacing)

SYSTEM FAN STATUS

=================

Fan 1 OK, Low speed setting

Fan 2 OK, Low speed setting

Fan 3 OK, Low speed setting

Fan 4 OK, Low speed setting

 

SYSTEM TEMPERATURE STATUS

=========================

Intake Left temperature: 25 Celsius, Normal

Intake Right temperature: 27 Celsius, Normal

Exhaust Left temperature: 32 Celsius, Normal

Exhaust Right temperature: 32 Celsius, Normal

CPU temperature: 54 Celsius, Normal

Power Supply Unit temperature: 26 Celsius, Normal

 

Thanks,

Erik 

 

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